Grinder and shredder



H. LSHELTON.

GRINDER AND SHREDDER.

APPLICA TION FILED APR.26|1920.

Patented Apr. 26, 1921.

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HARRY J. MELTON, Olii' S'I. ROUES, MISSOURI.

@ifdlNDER AND SEREDDER.

petasse.

Application le'd April 26, 1920. Serial VNo. 376,707.

To all whom t may concern:

Be it known that l, HARRY J. Sr-IEL'roN, residing in the city of St.Louis and State of Missouri, lhave invented a new and useful improvementin Grinders and Shredders, of which the following is a full, clear, andexact specification, reference being had to the accompanying drawings,which form a part thereof.

My invention relates to grinding and shredding machines wherein thegrinding and shredding is performed by rotating hammers which arepivotally mounted so that they can give or swing back when theyencounter an obstruction or a hard object.

The object of my invention'is to provide a means for pivotally mountingthe hammers that will keep them in fixed spaced relation and that willbe light and simple in its construction, thus saving material andreducing the first cost of the machine.

My invention is fully shown in the accompanying drawings where Figure 1is-a vertical interior view, partly in section, of a grinder andshredder embodying my invention; Fig. 2 is an enlarged view showingdetails of construction; Fig. 3 is an enlarged view showing the pivotalmounting of the hammers and the means whereby they are kept in fixedspaced relation with one another; and Figs. 4.- and 5 are views showing'modified forms of construction.

l Referring to the iigures, A is the lower portion of the 'housing ofthe machine to which is attached the upper portion B which is providedwith a chute C through which the material to be ground or shredded isfed. The interior of the portion Bis provided with a grinding surface D,and the lower part of the machine is provided with a screen E. The spaceinclosed by the grinding surface D and the screen E constitutes thegrinding or shredding chamber. F is a shaft which is rotatably mountedin the housing of the machine and which has fixed to it so as to rotatetherewith a plurality of disks H are hammers which are pivotally mountedon the pivot rods J which extend through openings formed in the disks G.The disks G are spaced with respect to one another so that a pluralityof hammers may be mounted between adjacent disks. In order to keep thehammers H in spaced position with one another lon the same pivot rod Jthere is provided for each rod a guide bar K which has formed in it aplurality of notches a. The guide bar K is positioned with respect tothe pivot rod J so that the' heels or the inner ends of the hammers willalways lie in the notches a for every position of the hammers, as shownin Figs. 3 and 4. The guide bars K are preferably made rectangular inform, and have at least one end thereof rectangular to engage with arectangular opening formed in the end disk, so as to prevent the barfrom turning. If the guide bar K is made round as shown in Fig. et, oneend thereof may be made square as shown "by the dotted lines and thisend may be made to engage with a square hole formed in the end disk. Itis to be understood that any means may be used for preventing the guidebars K from turning so as to move the notches out of engagement with theheels of the hammers.

Fig. 5 shows each hammer made of a plurality of separate pieces ormembers instead of a single piece as is shown in the other figures. .Thepieces used to form the hammers of Fig. 5 are preferably mounted on thepivot rods so that each can swing independently of the others. i Thepivot rods J and the guide bars K are provided with suitable means, suchas cotters L, whereby they are prevented from becomingTdisengaged fromthe supporting disks G. he hammers on adjacent pivot rods are preferablymounted in such a way that the hammers on one rod will be opposite theSpaces between the hammers on the'fadjacent rod. Thus the hammersindicated by the numeral l in Fig. 1 are shown in F ig. -2 spaced sothat they come opposite the spaces between the hammers represented bythe numeral 2.

As few of the disks G are used in the machine as is consistent withstrength, and as many hammers are placed between adjacent disks aspossible in order to reduce the weight of the rotating parts of themachine, thus decreasing the first cost and reducing the power re uiredto operate the machine.

t is evident that the sizes and proportions as well as the shapes of thevarious parts may be variedto suit different requirements, andthat thematerial of which the hammers are made may be that best suited for thework to be done. l

What I claim as new, and desire to secure by Letters Patent, is:

1. A grinding and shredding machine comprising a housing, a grindingchamber,

disks rotatably mounted in said chamber, pivot rods extending betweensaid kdisks, a plurality of hammers pivo-tally mounted -on said pivotrods between adjacent disks, and means engaging the sides of the innerends of said hammers and separate from and inv dependent of said pivotrod whereby the hammers on a pivot rod are maintained in spacedrelation.

2. A grinding and shredding machine comprising a housing, a grindingchamber, disks rotatably mounted in said chamber, pivot rods extendingbetween said disks, a plurality of hammers pivotally mounted on saidpivot rods between adjacent disks, and means engaging the sides4 offthe-inner endsl of said hammers and positionedwholly between said pivotrods and the center of rotation of said disks whereby the hammers latioon a pivot rod are maintained in spaced re- 3. A grinding and shreddingmachine 'comprising a housing, a grinding chamber,

' disks rotatably mounted in said chamber,

' between pivotally rods, a guide bar having recesses in one of itsfaces the walls `of which arevadapted to engagethe heels of said hammerswhereby the hammers on a pivot rod are maintained in spaced relatlon.

5. A nding vand shredding machine having a housing with a plurality ofrevoluble disks mounted therein, pivot rods extendingy between saiddisks, hammers pivotally. mounted in spaced relation on said pivot rods,and guide bars having notches adapted to receive the heels of saidhammers.

6. `A grinding and shredding machine hav- ``-ing a housing with aplurality of revoluble disks mounted therein, pivot rods extending saiddisks, hammers pivotally mounted in spaced relation on said pivot rods,guide bars having notches adapted to receive the heels of said hammers,and means whereby said guide bars are prevented from turning todisengage said hammers from said notches.

7. A grinding and shredding machine hav-` ing a housing with a pluralityof revoluble disks therein, pivot rods extending between said disks,hammers pivotally mounted in spaced relation on said pivot rods,thehammers of one pivot rod being so spaced as to be opposite the spacesbetween the hammers on an adjacent pivot rod, and guide bars havingnotches adapted to receive the heels of said hammers.

In witness whereof I have sign'ed my name to this specification.

HARRY J. SHELTON.

